ace.define("ace/occur",["require","exports","module","ace/lib/oop","ace/range","ace/search","ace/edit_session","ace/search_highlight","ace/lib/dom"], function(require, exports, module) {
  "use strict";

  var oop = require("./lib/oop");
  var Range = require("./range").Range;
  var Search = require("./search").Search;
  var EditSession = require("./edit_session").EditSession;
  var SearchHighlight = require("./search_highlight").SearchHighlight;
  function Occur() {}

  oop.inherits(Occur, Search);

  (function() {
    this.enter = function(editor, options) {
      if (!options.needle) return false;
      var pos = editor.getCursorPosition();
      this.displayOccurContent(editor, options);
      var translatedPos = this.originalToOccurPosition(editor.session, pos);
      editor.moveCursorToPosition(translatedPos);
      return true;
    }
    this.exit = function(editor, options) {
      var pos = options.translatePosition && editor.getCursorPosition();
      var translatedPos = pos && this.occurToOriginalPosition(editor.session, pos);
      this.displayOriginalContent(editor);
      if (translatedPos)
        editor.moveCursorToPosition(translatedPos);
      return true;
    }

    this.highlight = function(sess, regexp) {
      var hl = sess.$occurHighlight = sess.$occurHighlight || sess.addDynamicMarker(
          new SearchHighlight(null, "ace_occur-highlight", "text"));
      hl.setRegexp(regexp);
      sess._emit("changeBackMarker"); // force highlight layer redraw
    }

    this.displayOccurContent = function(editor, options) {
      this.$originalSession = editor.session;
      var found = this.matchingLines(editor.session, options);
      var lines = found.map(function(foundLine) { return foundLine.content; });
      var occurSession = new EditSession(lines.join('\n'));
      occurSession.$occur = this;
      occurSession.$occurMatchingLines = found;
      editor.setSession(occurSession);
      this.$useEmacsStyleLineStart = this.$originalSession.$useEmacsStyleLineStart;
      occurSession.$useEmacsStyleLineStart = this.$useEmacsStyleLineStart;
      this.highlight(occurSession, options.re);
      occurSession._emit('changeBackMarker');
    }

    this.displayOriginalContent = function(editor) {
      editor.setSession(this.$originalSession);
      this.$originalSession.$useEmacsStyleLineStart = this.$useEmacsStyleLineStart;
    }
    this.originalToOccurPosition = function(session, pos) {
      var lines = session.$occurMatchingLines;
      var nullPos = {row: 0, column: 0};
      if (!lines) return nullPos;
      for (var i = 0; i < lines.length; i++) {
        if (lines[i].row === pos.row)
          return {row: i, column: pos.column};
      }
      return nullPos;
    }
    this.occurToOriginalPosition = function(session, pos) {
      var lines = session.$occurMatchingLines;
      if (!lines || !lines[pos.row])
        return pos;
      return {row: lines[pos.row].row, column: pos.column};
    }

    this.matchingLines = function(session, options) {
      options = oop.mixin({}, options);
      if (!session || !options.needle) return [];
      var search = new Search();
      search.set(options);
      return search.findAll(session).reduce(function(lines, range) {
        var row = range.start.row;
        var last = lines[lines.length-1];
        return last && last.row === row ?
          lines :
          lines.concat({row: row, content: session.getLine(row)});
      }, []);
    }

  }).call(Occur.prototype);

  var dom = require('./lib/dom');
  dom.importCssString(".ace_occur-highlight {\n\
    border-radius: 4px;\n\
    background-color: rgba(87, 255, 8, 0.25);\n\
    position: absolute;\n\
    z-index: 4;\n\
    -moz-box-sizing: border-box;\n\
    -webkit-box-sizing: border-box;\n\
    box-sizing: border-box;\n\
    box-shadow: 0 0 4px rgb(91, 255, 50);\n\
}\n\
.ace_dark .ace_occur-highlight {\n\
    background-color: rgb(80, 140, 85);\n\
    box-shadow: 0 0 4px rgb(60, 120, 70);\n\
}\n", "incremental-occur-highlighting");

  exports.Occur = Occur;

});

ace.define("ace/commands/occur_commands",["require","exports","module","ace/config","ace/occur","ace/keyboard/hash_handler","ace/lib/oop"], function(require, exports, module) {

  var config = require("../config"),
    Occur = require("../occur").Occur;
  var occurStartCommand = {
    name: "occur",
    exec: function(editor, options) {
      var alreadyInOccur = !!editor.session.$occur;
      var occurSessionActive = new Occur().enter(editor, options);
      if (occurSessionActive && !alreadyInOccur)
        OccurKeyboardHandler.installIn(editor);
    },
    readOnly: true
  };

  var occurCommands = [{
    name: "occurexit",
    bindKey: 'esc|Ctrl-G',
    exec: function(editor) {
      var occur = editor.session.$occur;
      if (!occur) return;
      occur.exit(editor, {});
      if (!editor.session.$occur) OccurKeyboardHandler.uninstallFrom(editor);
    },
    readOnly: true
  }, {
    name: "occuraccept",
    bindKey: 'enter',
    exec: function(editor) {
      var occur = editor.session.$occur;
      if (!occur) return;
      occur.exit(editor, {translatePosition: true});
      if (!editor.session.$occur) OccurKeyboardHandler.uninstallFrom(editor);
    },
    readOnly: true
  }];

  var HashHandler = require("../keyboard/hash_handler").HashHandler;
  var oop = require("../lib/oop");


  function OccurKeyboardHandler() {}

  oop.inherits(OccurKeyboardHandler, HashHandler);

  (function() {

    this.isOccurHandler = true;

    this.attach = function(editor) {
      HashHandler.call(this, occurCommands, editor.commands.platform);
      this.$editor = editor;
    }

    var handleKeyboard$super = this.handleKeyboard;
    this.handleKeyboard = function(data, hashId, key, keyCode) {
      var cmd = handleKeyboard$super.call(this, data, hashId, key, keyCode);
      return (cmd && cmd.command) ? cmd : undefined;
    }

  }).call(OccurKeyboardHandler.prototype);

  OccurKeyboardHandler.installIn = function(editor) {
    var handler = new this();
    editor.keyBinding.addKeyboardHandler(handler);
    editor.commands.addCommands(occurCommands);
  }

  OccurKeyboardHandler.uninstallFrom = function(editor) {
    editor.commands.removeCommands(occurCommands);
    var handler = editor.getKeyboardHandler();
    if (handler.isOccurHandler)
      editor.keyBinding.removeKeyboardHandler(handler);
  }

  exports.occurStartCommand = occurStartCommand;

});

ace.define("ace/commands/incremental_search_commands",["require","exports","module","ace/config","ace/lib/oop","ace/keyboard/hash_handler","ace/commands/occur_commands"], function(require, exports, module) {

  var config = require("../config");
  var oop = require("../lib/oop");
  var HashHandler = require("../keyboard/hash_handler").HashHandler;
  var occurStartCommand = require("./occur_commands").occurStartCommand;
  exports.iSearchStartCommands = [{
    name: "iSearch",
    bindKey: {win: "Ctrl-F", mac: "Command-F"},
    exec: function(editor, options) {
      config.loadModule(["core", "ace/incremental_search"], function(e) {
        var iSearch = e.iSearch = e.iSearch || new e.IncrementalSearch();
        iSearch.activate(editor, options.backwards);
        if (options.jumpToFirstMatch) iSearch.next(options);
      });
    },
    readOnly: true
  }, {
    name: "iSearchBackwards",
    exec: function(editor, jumpToNext) { editor.execCommand('iSearch', {backwards: true}); },
    readOnly: true
  }, {
    name: "iSearchAndGo",
    bindKey: {win: "Ctrl-K", mac: "Command-G"},
    exec: function(editor, jumpToNext) { editor.execCommand('iSearch', {jumpToFirstMatch: true, useCurrentOrPrevSearch: true}); },
    readOnly: true
  }, {
    name: "iSearchBackwardsAndGo",
    bindKey: {win: "Ctrl-Shift-K", mac: "Command-Shift-G"},
    exec: function(editor) { editor.execCommand('iSearch', {jumpToFirstMatch: true, backwards: true, useCurrentOrPrevSearch: true}); },
    readOnly: true
  }];
  exports.iSearchCommands = [{
    name: "restartSearch",
    bindKey: {win: "Ctrl-F", mac: "Command-F"},
    exec: function(iSearch) {
      iSearch.cancelSearch(true);
    }
  }, {
    name: "searchForward",
    bindKey: {win: "Ctrl-S|Ctrl-K", mac: "Ctrl-S|Command-G"},
    exec: function(iSearch, options) {
      options.useCurrentOrPrevSearch = true;
      iSearch.next(options);
    }
  }, {
    name: "searchBackward",
    bindKey: {win: "Ctrl-R|Ctrl-Shift-K", mac: "Ctrl-R|Command-Shift-G"},
    exec: function(iSearch, options) {
      options.useCurrentOrPrevSearch = true;
      options.backwards = true;
      iSearch.next(options);
    }
  }, {
    name: "extendSearchTerm",
    exec: function(iSearch, string) {
      iSearch.addString(string);
    }
  }, {
    name: "extendSearchTermSpace",
    bindKey: "space",
    exec: function(iSearch) { iSearch.addString(' '); }
  }, {
    name: "shrinkSearchTerm",
    bindKey: "backspace",
    exec: function(iSearch) {
      iSearch.removeChar();
    }
  }, {
    name: 'confirmSearch',
    bindKey: 'return',
    exec: function(iSearch) { iSearch.deactivate(); }
  }, {
    name: 'cancelSearch',
    bindKey: 'esc|Ctrl-G',
    exec: function(iSearch) { iSearch.deactivate(true); }
  }, {
    name: 'occurisearch',
    bindKey: 'Ctrl-O',
    exec: function(iSearch) {
      var options = oop.mixin({}, iSearch.$options);
      iSearch.deactivate();
      occurStartCommand.exec(iSearch.$editor, options);
    }
  }, {
    name: "yankNextWord",
    bindKey: "Ctrl-w",
    exec: function(iSearch) {
      var ed = iSearch.$editor,
        range = ed.selection.getRangeOfMovements(function(sel) { sel.moveCursorWordRight(); }),
        string = ed.session.getTextRange(range);
      iSearch.addString(string);
    }
  }, {
    name: "yankNextChar",
    bindKey: "Ctrl-Alt-y",
    exec: function(iSearch) {
      var ed = iSearch.$editor,
        range = ed.selection.getRangeOfMovements(function(sel) { sel.moveCursorRight(); }),
        string = ed.session.getTextRange(range);
      iSearch.addString(string);
    }
  }, {
    name: 'recenterTopBottom',
    bindKey: 'Ctrl-l',
    exec: function(iSearch) { iSearch.$editor.execCommand('recenterTopBottom'); }
  }, {
    name: 'selectAllMatches',
    bindKey: 'Ctrl-space',
    exec: function(iSearch) {
      var ed = iSearch.$editor,
        hl = ed.session.$isearchHighlight,
        ranges = hl && hl.cache ? hl.cache
          .reduce(function(ranges, ea) {
            return ranges.concat(ea ? ea : []); }, []) : [];
      iSearch.deactivate(false);
      ranges.forEach(ed.selection.addRange.bind(ed.selection));
    }
  }, {
    name: 'searchAsRegExp',
    bindKey: 'Alt-r',
    exec: function(iSearch) {
      iSearch.convertNeedleToRegExp();
    }
  }].map(function(cmd) {
    cmd.readOnly = true;
    cmd.isIncrementalSearchCommand = true;
    cmd.scrollIntoView = "animate-cursor";
    return cmd;
  });

  function IncrementalSearchKeyboardHandler(iSearch) {
    this.$iSearch = iSearch;
  }

  oop.inherits(IncrementalSearchKeyboardHandler, HashHandler);

  (function() {

    this.attach = function(editor) {
      var iSearch = this.$iSearch;
      HashHandler.call(this, exports.iSearchCommands, editor.commands.platform);
      this.$commandExecHandler = editor.commands.addEventListener('exec', function(e) {
        if (!e.command.isIncrementalSearchCommand)
          return iSearch.deactivate();
        e.stopPropagation();
        e.preventDefault();
        var scrollTop = editor.session.getScrollTop();
        var result = e.command.exec(iSearch, e.args || {});
        editor.renderer.scrollCursorIntoView(null, 0.5);
        editor.renderer.animateScrolling(scrollTop);
        return result;
      });
    };

    this.detach = function(editor) {
      if (!this.$commandExecHandler) return;
      editor.commands.removeEventListener('exec', this.$commandExecHandler);
      delete this.$commandExecHandler;
    };

    var handleKeyboard$super = this.handleKeyboard;
    this.handleKeyboard = function(data, hashId, key, keyCode) {
      if (((hashId === 1/*ctrl*/ || hashId === 8/*command*/) && key === 'v')
        || (hashId === 1/*ctrl*/ && key === 'y')) return null;
      var cmd = handleKeyboard$super.call(this, data, hashId, key, keyCode);
      if (cmd.command) { return cmd; }
      if (hashId == -1) {
        var extendCmd = this.commands.extendSearchTerm;
        if (extendCmd) { return {command: extendCmd, args: key}; }
      }
      return false;
    };

  }).call(IncrementalSearchKeyboardHandler.prototype);


  exports.IncrementalSearchKeyboardHandler = IncrementalSearchKeyboardHandler;

});

ace.define("ace/incremental_search",["require","exports","module","ace/lib/oop","ace/range","ace/search","ace/search_highlight","ace/commands/incremental_search_commands","ace/lib/dom","ace/commands/command_manager","ace/editor","ace/config"], function(require, exports, module) {
  "use strict";

  var oop = require("./lib/oop");
  var Range = require("./range").Range;
  var Search = require("./search").Search;
  var SearchHighlight = require("./search_highlight").SearchHighlight;
  var iSearchCommandModule = require("./commands/incremental_search_commands");
  var ISearchKbd = iSearchCommandModule.IncrementalSearchKeyboardHandler;
  function IncrementalSearch() {
    this.$options = {wrap: false, skipCurrent: false};
    this.$keyboardHandler = new ISearchKbd(this);
  }

  oop.inherits(IncrementalSearch, Search);

  function isRegExp(obj) {
    return obj instanceof RegExp;
  }

  function regExpToObject(re) {
    var string = String(re),
      start = string.indexOf('/'),
      flagStart = string.lastIndexOf('/');
    return {
      expression: string.slice(start+1, flagStart),
      flags: string.slice(flagStart+1)
    }
  }

  function stringToRegExp(string, flags) {
    try {
      return new RegExp(string, flags);
    } catch (e) { return string; }
  }

  function objectToRegExp(obj) {
    return stringToRegExp(obj.expression, obj.flags);
  }

  (function() {

    this.activate = function(ed, backwards) {
      this.$editor = ed;
      this.$startPos = this.$currentPos = ed.getCursorPosition();
      this.$options.needle = '';
      this.$options.backwards = backwards;
      ed.keyBinding.addKeyboardHandler(this.$keyboardHandler);
      this.$originalEditorOnPaste = ed.onPaste; ed.onPaste = this.onPaste.bind(this);
      this.$mousedownHandler = ed.addEventListener('mousedown', this.onMouseDown.bind(this));
      this.selectionFix(ed);
      this.statusMessage(true);
    };

    this.deactivate = function(reset) {
      this.cancelSearch(reset);
      var ed = this.$editor;
      ed.keyBinding.removeKeyboardHandler(this.$keyboardHandler);
      if (this.$mousedownHandler) {
        ed.removeEventListener('mousedown', this.$mousedownHandler);
        delete this.$mousedownHandler;
      }
      ed.onPaste = this.$originalEditorOnPaste;
      this.message('');
    };

    this.selectionFix = function(editor) {
      if (editor.selection.isEmpty() && !editor.session.$emacsMark) {
        editor.clearSelection();
      }
    };

    this.highlight = function(regexp) {
      var sess = this.$editor.session,
        hl = sess.$isearchHighlight = sess.$isearchHighlight || sess.addDynamicMarker(
            new SearchHighlight(null, "ace_isearch-result", "text"));
      hl.setRegexp(regexp);
      sess._emit("changeBackMarker"); // force highlight layer redraw
    };

    this.cancelSearch = function(reset) {
      var e = this.$editor;
      this.$prevNeedle = this.$options.needle;
      this.$options.needle = '';
      if (reset) {
        e.moveCursorToPosition(this.$startPos);
        this.$currentPos = this.$startPos;
      } else {
        e.pushEmacsMark && e.pushEmacsMark(this.$startPos, false);
      }
      this.highlight(null);
      return Range.fromPoints(this.$currentPos, this.$currentPos);
    };

    this.highlightAndFindWithNeedle = function(moveToNext, needleUpdateFunc) {
      if (!this.$editor) return null;
      var options = this.$options;
      if (needleUpdateFunc) {
        options.needle = needleUpdateFunc.call(this, options.needle || '') || '';
      }
      if (options.needle.length === 0) {
        this.statusMessage(true);
        return this.cancelSearch(true);
      }
      options.start = this.$currentPos;
      var session = this.$editor.session,
        found = this.find(session),
        shouldSelect = this.$editor.emacsMark ?
          !!this.$editor.emacsMark() : !this.$editor.selection.isEmpty();
      if (found) {
        if (options.backwards) found = Range.fromPoints(found.end, found.start);
        this.$editor.selection.setRange(Range.fromPoints(shouldSelect ? this.$startPos : found.end, found.end));
        if (moveToNext) this.$currentPos = found.end;
        this.highlight(options.re);
      }

      this.statusMessage(found);

      return found;
    };

    this.addString = function(s) {
      return this.highlightAndFindWithNeedle(false, function(needle) {
        if (!isRegExp(needle))
          return needle + s;
        var reObj = regExpToObject(needle);
        reObj.expression += s;
        return objectToRegExp(reObj);
      });
    };

    this.removeChar = function(c) {
      return this.highlightAndFindWithNeedle(false, function(needle) {
        if (!isRegExp(needle))
          return needle.substring(0, needle.length-1);
        var reObj = regExpToObject(needle);
        reObj.expression = reObj.expression.substring(0, reObj.expression.length-1);
        return objectToRegExp(reObj);
      });
    };

    this.next = function(options) {
      options = options || {};
      this.$options.backwards = !!options.backwards;
      this.$currentPos = this.$editor.getCursorPosition();
      return this.highlightAndFindWithNeedle(true, function(needle) {
        return options.useCurrentOrPrevSearch && needle.length === 0 ?
        this.$prevNeedle || '' : needle;
      });
    };

    this.onMouseDown = function(evt) {
      this.deactivate();
      return true;
    };

    this.onPaste = function(text) {
      this.addString(text);
    };

    this.convertNeedleToRegExp = function() {
      return this.highlightAndFindWithNeedle(false, function(needle) {
        return isRegExp(needle) ? needle : stringToRegExp(needle, 'ig');
      });
    };

    this.convertNeedleToString = function() {
      return this.highlightAndFindWithNeedle(false, function(needle) {
        return isRegExp(needle) ? regExpToObject(needle).expression : needle;
      });
    };

    this.statusMessage = function(found) {
      var options = this.$options, msg = '';
      msg += options.backwards ? 'reverse-' : '';
      msg += 'isearch: ' + options.needle;
      msg += found ? '' : ' (not found)';
      this.message(msg);
    };

    this.message = function(msg) {
      if (this.$editor.showCommandLine) {
        this.$editor.showCommandLine(msg);
        this.$editor.focus();
      } else {
        console.log(msg);
      }
    };

  }).call(IncrementalSearch.prototype);


  exports.IncrementalSearch = IncrementalSearch;

  var dom = require('./lib/dom');
  dom.importCssString && dom.importCssString("\
.ace_marker-layer .ace_isearch-result {\
  position: absolute;\
  z-index: 6;\
  -moz-box-sizing: border-box;\
  -webkit-box-sizing: border-box;\
  box-sizing: border-box;\
}\
div.ace_isearch-result {\
  border-radius: 4px;\
  background-color: rgba(255, 200, 0, 0.5);\
  box-shadow: 0 0 4px rgb(255, 200, 0);\
}\
.ace_dark div.ace_isearch-result {\
  background-color: rgb(100, 110, 160);\
  box-shadow: 0 0 4px rgb(80, 90, 140);\
}", "incremental-search-highlighting");
  var commands = require("./commands/command_manager");
  (function() {
    this.setupIncrementalSearch = function(editor, val) {
      if (this.usesIncrementalSearch == val) return;
      this.usesIncrementalSearch = val;
      var iSearchCommands = iSearchCommandModule.iSearchStartCommands;
      var method = val ? 'addCommands' : 'removeCommands';
      this[method](iSearchCommands);
    };
  }).call(commands.CommandManager.prototype);
  var Editor = require("./editor").Editor;
  require("./config").defineOptions(Editor.prototype, "editor", {
    useIncrementalSearch: {
      set: function(val) {
        this.keyBinding.$handlers.forEach(function(handler) {
          if (handler.setupIncrementalSearch) {
            handler.setupIncrementalSearch(this, val);
          }
        });
        this._emit('incrementalSearchSettingChanged', {isEnabled: val});
      }
    }
  });

});

ace.define("ace/keyboard/emacs",["require","exports","module","ace/lib/dom","ace/incremental_search","ace/commands/incremental_search_commands","ace/keyboard/hash_handler","ace/lib/keys"], function(require, exports, module) {
  "use strict";

  var dom = require("../lib/dom");
  require("../incremental_search");
  var iSearchCommandModule = require("../commands/incremental_search_commands");


  var screenToTextBlockCoordinates = function(x, y) {
    var canvasPos = this.scroller.getBoundingClientRect();

    var col = Math.floor(
      (x + this.scrollLeft - canvasPos.left - this.$padding) / this.characterWidth
    );
    var row = Math.floor(
      (y + this.scrollTop - canvasPos.top) / this.lineHeight
    );

    return this.session.screenToDocumentPosition(row, col);
  };

  var HashHandler = require("./hash_handler").HashHandler;
  exports.handler = new HashHandler();

  exports.handler.isEmacs = true;
  exports.handler.$id = "ace/keyboard/emacs";

  var initialized = false;
  var $formerLongWords;
  var $formerLineStart;

  exports.handler.attach = function(editor) {
    if (!initialized) {
      initialized = true;
      dom.importCssString('\
            .emacs-mode .ace_cursor{\
                border: 1px rgba(50,250,50,0.8) solid!important;\
                -moz-box-sizing: border-box!important;\
                -webkit-box-sizing: border-box!important;\
                box-sizing: border-box!important;\
                background-color: rgba(0,250,0,0.9);\
                opacity: 0.5;\
            }\
            .emacs-mode .ace_hidden-cursors .ace_cursor{\
                opacity: 1;\
                background-color: transparent;\
            }\
            .emacs-mode .ace_overwrite-cursors .ace_cursor {\
                opacity: 1;\
                background-color: transparent;\
                border-width: 0 0 2px 2px !important;\
            }\
            .emacs-mode .ace_text-layer {\
                z-index: 4\
            }\
            .emacs-mode .ace_cursor-layer {\
                z-index: 2\
            }', 'emacsMode'
      );
    }
    $formerLongWords = editor.session.$selectLongWords;
    editor.session.$selectLongWords = true;
    $formerLineStart = editor.session.$useEmacsStyleLineStart;
    editor.session.$useEmacsStyleLineStart = true;

    editor.session.$emacsMark = null; // the active mark
    editor.session.$emacsMarkRing = editor.session.$emacsMarkRing || [];

    editor.emacsMark = function() {
      return this.session.$emacsMark;
    };

    editor.setEmacsMark = function(p) {
      this.session.$emacsMark = p;
    };

    editor.pushEmacsMark = function(p, activate) {
      var prevMark = this.session.$emacsMark;
      if (prevMark)
        this.session.$emacsMarkRing.push(prevMark);
      if (!p || activate) this.setEmacsMark(p);
      else this.session.$emacsMarkRing.push(p);
    };

    editor.popEmacsMark = function() {
      var mark = this.emacsMark();
      if (mark) { this.setEmacsMark(null); return mark; }
      return this.session.$emacsMarkRing.pop();
    };

    editor.getLastEmacsMark = function(p) {
      return this.session.$emacsMark || this.session.$emacsMarkRing.slice(-1)[0];
    };

    editor.emacsMarkForSelection = function(replacement) {
      var sel = this.selection,
        multiRangeLength = this.multiSelect ?
          this.multiSelect.getAllRanges().length : 1,
        selIndex = sel.index || 0,
        markRing = this.session.$emacsMarkRing,
        markIndex = markRing.length - (multiRangeLength - selIndex),
        lastMark = markRing[markIndex] || sel.anchor;
      if (replacement) {
        markRing.splice(markIndex, 1,
          "row" in replacement && "column" in replacement ?
            replacement : undefined);
      }
      return lastMark;
    }

    editor.on("click", $resetMarkMode);
    editor.on("changeSession", $kbSessionChange);
    editor.renderer.screenToTextCoordinates = screenToTextBlockCoordinates;
    editor.setStyle("emacs-mode");
    editor.commands.addCommands(commands);
    exports.handler.platform = editor.commands.platform;
    editor.$emacsModeHandler = this;
    editor.addEventListener('copy', this.onCopy);
    editor.addEventListener('paste', this.onPaste);
  };

  exports.handler.detach = function(editor) {
    delete editor.renderer.screenToTextCoordinates;
    editor.session.$selectLongWords = $formerLongWords;
    editor.session.$useEmacsStyleLineStart = $formerLineStart;
    editor.removeEventListener("click", $resetMarkMode);
    editor.removeEventListener("changeSession", $kbSessionChange);
    editor.unsetStyle("emacs-mode");
    editor.commands.removeCommands(commands);
    editor.removeEventListener('copy', this.onCopy);
    editor.removeEventListener('paste', this.onPaste);
    editor.$emacsModeHandler = null;
  };

  var $kbSessionChange = function(e) {
    if (e.oldSession) {
      e.oldSession.$selectLongWords = $formerLongWords;
      e.oldSession.$useEmacsStyleLineStart = $formerLineStart;
    }

    $formerLongWords = e.session.$selectLongWords;
    e.session.$selectLongWords = true;
    $formerLineStart = e.session.$useEmacsStyleLineStart;
    e.session.$useEmacsStyleLineStart = true;

    if (!e.session.hasOwnProperty('$emacsMark'))
      e.session.$emacsMark = null;
    if (!e.session.hasOwnProperty('$emacsMarkRing'))
      e.session.$emacsMarkRing = [];
  };

  var $resetMarkMode = function(e) {
    e.editor.session.$emacsMark = null;
  };

  var keys = require("../lib/keys").KEY_MODS;
  var eMods = {C: "ctrl", S: "shift", M: "alt", CMD: "command"};
  var combinations = ["C-S-M-CMD",
    "S-M-CMD", "C-M-CMD", "C-S-CMD", "C-S-M",
    "M-CMD", "S-CMD", "S-M", "C-CMD", "C-M", "C-S",
    "CMD", "M", "S", "C"];
  combinations.forEach(function(c) {
    var hashId = 0;
    c.split("-").forEach(function(c) {
      hashId = hashId | keys[eMods[c]];
    });
    eMods[hashId] = c.toLowerCase() + "-";
  });

  exports.handler.onCopy = function(e, editor) {
    if (editor.$handlesEmacsOnCopy) return;
    editor.$handlesEmacsOnCopy = true;
    exports.handler.commands.killRingSave.exec(editor);
    editor.$handlesEmacsOnCopy = false;
  };

  exports.handler.onPaste = function(e, editor) {
    editor.pushEmacsMark(editor.getCursorPosition());
  };

  exports.handler.bindKey = function(key, command) {
    if (typeof key == "object")
      key = key[this.platform];
    if (!key)
      return;

    var ckb = this.commandKeyBinding;
    key.split("|").forEach(function(keyPart) {
      keyPart = keyPart.toLowerCase();
      ckb[keyPart] = command;
      var keyParts = keyPart.split(" ").slice(0,-1);
      keyParts.reduce(function(keyMapKeys, keyPart, i) {
        var prefix = keyMapKeys[i-1] ? keyMapKeys[i-1] + ' ' : '';
        return keyMapKeys.concat([prefix + keyPart]);
      }, []).forEach(function(keyPart) {
        if (!ckb[keyPart]) ckb[keyPart] = "null";
      });
    }, this);
  };

  exports.handler.getStatusText = function(editor, data) {
    var str = "";
    if (data.count)
      str += data.count;
    if (data.keyChain)
      str += " " + data.keyChain
    return str;
  };

  exports.handler.handleKeyboard = function(data, hashId, key, keyCode) {
    if (keyCode === -1) return undefined;

    var editor = data.editor;
    editor._signal("changeStatus");
    if (hashId == -1) {
      editor.pushEmacsMark();
      if (data.count) {
        var str = new Array(data.count + 1).join(key);
        data.count = null;
        return {command: "insertstring", args: str};
      }
    }

    var modifier = eMods[hashId];
    if (modifier == "c-" || data.count) {
      var count = parseInt(key[key.length - 1]);
      if (typeof count === 'number' && !isNaN(count)) {
        data.count = Math.max(data.count, 0) || 0;
        data.count = 10 * data.count + count;
        return {command: "null"};
      }
    }
    if (modifier) key = modifier + key;
    if (data.keyChain) key = data.keyChain += " " + key;
    var command = this.commandKeyBinding[key];
    data.keyChain = command == "null" ? key : "";
    if (!command) return undefined;
    if (command === "null") return {command: "null"};

    if (command === "universalArgument") {
      data.count = -4;
      return {command: "null"};
    }
    var args;
    if (typeof command !== "string") {
      args = command.args;
      if (command.command) command = command.command;
      if (command === "goorselect") {
        command = editor.emacsMark() ? args[1] : args[0];
        args = null;
      }
    }

    if (typeof command === "string") {
      if (command === "insertstring" ||
        command === "splitline" ||
        command === "togglecomment") {
        editor.pushEmacsMark();
      }
      command = this.commands[command] || editor.commands.commands[command];
      if (!command) return undefined;
    }

    if (!command.readOnly && !command.isYank)
      data.lastCommand = null;

    if (!command.readOnly && editor.emacsMark())
      editor.setEmacsMark(null)

    if (data.count) {
      var count = data.count;
      data.count = 0;
      if (!command || !command.handlesCount) {
        return {
          args: args,
          command: {
            exec: function(editor, args) {
              for (var i = 0; i < count; i++)
                command.exec(editor, args);
            },
            multiSelectAction: command.multiSelectAction
          }
        };
      } else {
        if (!args) args = {};
        if (typeof args === 'object') args.count = count;
      }
    }

    return {command: command, args: args};
  };

  exports.emacsKeys = {
    "Up|C-p"      : {command: "goorselect", args: ["golineup","selectup"]},
    "Down|C-n"    : {command: "goorselect", args: ["golinedown","selectdown"]},
    "Left|C-b"    : {command: "goorselect", args: ["gotoleft","selectleft"]},
    "Right|C-f"   : {command: "goorselect", args: ["gotoright","selectright"]},
    "C-Left|M-b"  : {command: "goorselect", args: ["gotowordleft","selectwordleft"]},
    "C-Right|M-f" : {command: "goorselect", args: ["gotowordright","selectwordright"]},
    "Home|C-a"    : {command: "goorselect", args: ["gotolinestart","selecttolinestart"]},
    "End|C-e"     : {command: "goorselect", args: ["gotolineend","selecttolineend"]},
    "C-Home|S-M-,": {command: "goorselect", args: ["gotostart","selecttostart"]},
    "C-End|S-M-." : {command: "goorselect", args: ["gotoend","selecttoend"]},
    "S-Up|S-C-p"      : "selectup",
    "S-Down|S-C-n"    : "selectdown",
    "S-Left|S-C-b"    : "selectleft",
    "S-Right|S-C-f"   : "selectright",
    "S-C-Left|S-M-b"  : "selectwordleft",
    "S-C-Right|S-M-f" : "selectwordright",
    "S-Home|S-C-a"    : "selecttolinestart",
    "S-End|S-C-e"     : "selecttolineend",
    "S-C-Home"        : "selecttostart",
    "S-C-End"         : "selecttoend",

    "C-l" : "recenterTopBottom",
    "M-s" : "centerselection",
    "M-g": "gotoline",
    "C-x C-p": "selectall",
    "C-Down": {command: "goorselect", args: ["gotopagedown","selectpagedown"]},
    "C-Up": {command: "goorselect", args: ["gotopageup","selectpageup"]},
    "PageDown|C-v": {command: "goorselect", args: ["gotopagedown","selectpagedown"]},
    "PageUp|M-v": {command: "goorselect", args: ["gotopageup","selectpageup"]},
    "S-C-Down": "selectpagedown",
    "S-C-Up": "selectpageup",

    "C-s": "iSearch",
    "C-r": "iSearchBackwards",

    "M-C-s": "findnext",
    "M-C-r": "findprevious",
    "S-M-5": "replace",
    "Backspace": "backspace",
    "Delete|C-d": "del",
    "Return|C-m": {command: "insertstring", args: "\n"}, // "newline"
    "C-o": "splitline",

    "M-d|C-Delete": {command: "killWord", args: "right"},
    "C-Backspace|M-Backspace|M-Delete": {command: "killWord", args: "left"},
    "C-k": "killLine",

    "C-y|S-Delete": "yank",
    "M-y": "yankRotate",
    "C-g": "keyboardQuit",

    "C-w|C-S-W": "killRegion",
    "M-w": "killRingSave",
    "C-Space": "setMark",
    "C-x C-x": "exchangePointAndMark",

    "C-t": "transposeletters",
    "M-u": "touppercase",    // Doesn't work
    "M-l": "tolowercase",
    "M-/": "autocomplete",   // Doesn't work
    "C-u": "universalArgument",

    "M-;": "togglecomment",

    "C-/|C-x u|S-C--|C-z": "undo",
    "S-C-/|S-C-x u|C--|S-C-z": "redo", // infinite undo?
    "C-x r":  "selectRectangularRegion",
    "M-x": {command: "focusCommandLine", args: "M-x "}
  };


  exports.handler.bindKeys(exports.emacsKeys);

  exports.handler.addCommands({
    recenterTopBottom: function(editor) {
      var renderer = editor.renderer;
      var pos = renderer.$cursorLayer.getPixelPosition();
      var h = renderer.$size.scrollerHeight - renderer.lineHeight;
      var scrollTop = renderer.scrollTop;
      if (Math.abs(pos.top - scrollTop) < 2) {
        scrollTop = pos.top - h;
      } else if (Math.abs(pos.top - scrollTop - h * 0.5) < 2) {
        scrollTop = pos.top;
      } else {
        scrollTop = pos.top - h * 0.5;
      }
      editor.session.setScrollTop(scrollTop);
    },
    selectRectangularRegion:  function(editor) {
      editor.multiSelect.toggleBlockSelection();
    },
    setMark:  {
      exec: function(editor, args) {

        if (args && args.count) {
          if (editor.inMultiSelectMode) editor.forEachSelection(moveToMark);
          else moveToMark();
          moveToMark();
          return;
        }

        var mark = editor.emacsMark(),
          ranges = editor.selection.getAllRanges(),
          rangePositions = ranges.map(function(r) { return {row: r.start.row, column: r.start.column}; }),
          transientMarkModeActive = true,
          hasNoSelection = ranges.every(function(range) { return range.isEmpty(); });
        if (transientMarkModeActive && (mark || !hasNoSelection)) {
          if (editor.inMultiSelectMode) editor.forEachSelection({exec: editor.clearSelection.bind(editor)});
          else editor.clearSelection();
          if (mark) editor.pushEmacsMark(null);
          return;
        }

        if (!mark) {
          rangePositions.forEach(function(pos) { editor.pushEmacsMark(pos); });
          editor.setEmacsMark(rangePositions[rangePositions.length-1]);
          return;
        }

        function moveToMark() {
          var mark = editor.popEmacsMark();
          mark && editor.moveCursorToPosition(mark);
        }

      },
      readOnly: true,
      handlesCount: true
    },
    exchangePointAndMark: {
      exec: function exchangePointAndMark$exec(editor, args) {
        var sel = editor.selection;
        if (!args.count && !sel.isEmpty()) { // just invert selection
          sel.setSelectionRange(sel.getRange(), !sel.isBackwards());
          return;
        }

        if (args.count) { // replace mark and point
          var pos = {row: sel.lead.row, column: sel.lead.column};
          sel.clearSelection();
          sel.moveCursorToPosition(editor.emacsMarkForSelection(pos));
        } else { // create selection to last mark
          sel.selectToPosition(editor.emacsMarkForSelection());
        }
      },
      readOnly: true,
      handlesCount: true,
      multiSelectAction: "forEach"
    },
    killWord: {
      exec: function(editor, dir) {
        editor.clearSelection();
        if (dir == "left")
          editor.selection.selectWordLeft();
        else
          editor.selection.selectWordRight();

        var range = editor.getSelectionRange();
        var text = editor.session.getTextRange(range);
        exports.killRing.add(text);

        editor.session.remove(range);
        editor.clearSelection();
      },
      multiSelectAction: "forEach"
    },
    killLine: function(editor) {
      editor.pushEmacsMark(null);
      editor.clearSelection();
      var range = editor.getSelectionRange();
      var line = editor.session.getLine(range.start.row);
      range.end.column = line.length;
      line = line.substr(range.start.column)

      var foldLine = editor.session.getFoldLine(range.start.row);
      if (foldLine && range.end.row != foldLine.end.row) {
        range.end.row = foldLine.end.row;
        line = "x";
      }
      if (/^\s*$/.test(line)) {
        range.end.row++;
        line = editor.session.getLine(range.end.row);
        range.end.column = /^\s*$/.test(line) ? line.length : 0;
      }
      var text = editor.session.getTextRange(range);
      if (editor.prevOp.command == this)
        exports.killRing.append(text);
      else
        exports.killRing.add(text);

      editor.session.remove(range);
      editor.clearSelection();
    },
    yank: function(editor) {
      editor.onPaste(exports.killRing.get() || '');
      editor.keyBinding.$data.lastCommand = "yank";
    },
    yankRotate: function(editor) {
      if (editor.keyBinding.$data.lastCommand != "yank")
        return;
      editor.undo();
      editor.session.$emacsMarkRing.pop(); // also undo recording mark
      editor.onPaste(exports.killRing.rotate());
      editor.keyBinding.$data.lastCommand = "yank";
    },
    killRegion: {
      exec: function(editor) {
        exports.killRing.add(editor.getCopyText());
        editor.commands.byName.cut.exec(editor);
        editor.setEmacsMark(null);
      },
      readOnly: true,
      multiSelectAction: "forEach"
    },
    killRingSave: {
      exec: function(editor) {

        editor.$handlesEmacsOnCopy = true;
        var marks = editor.session.$emacsMarkRing.slice(),
          deselectedMarks = [];
        exports.killRing.add(editor.getCopyText());

        setTimeout(function() {
          function deselect() {
            var sel = editor.selection, range = sel.getRange(),
              pos = sel.isBackwards() ? range.end : range.start;
            deselectedMarks.push({row: pos.row, column: pos.column});
            sel.clearSelection();
          }
          editor.$handlesEmacsOnCopy = false;
          if (editor.inMultiSelectMode) editor.forEachSelection({exec: deselect});
          else deselect();
          editor.session.$emacsMarkRing = marks.concat(deselectedMarks.reverse());
        }, 0);
      },
      readOnly: true
    },
    keyboardQuit: function(editor) {
      editor.selection.clearSelection();
      editor.setEmacsMark(null);
      editor.keyBinding.$data.count = null;
    },
    focusCommandLine: function(editor, arg) {
      if (editor.showCommandLine)
        editor.showCommandLine(arg);
    }
  });

  exports.handler.addCommands(iSearchCommandModule.iSearchStartCommands);

  var commands = exports.handler.commands;
  commands.yank.isYank = true;
  commands.yankRotate.isYank = true;

  exports.killRing = {
    $data: [],
    add: function(str) {
      str && this.$data.push(str);
      if (this.$data.length > 30)
        this.$data.shift();
    },
    append: function(str) {
      var idx = this.$data.length - 1;
      var text = this.$data[idx] || "";
      if (str) text += str;
      if (text) this.$data[idx] = text;
    },
    get: function(n) {
      n = n || 1;
      return this.$data.slice(this.$data.length-n, this.$data.length).reverse().join('\n');
    },
    pop: function() {
      if (this.$data.length > 1)
        this.$data.pop();
      return this.get();
    },
    rotate: function() {
      this.$data.unshift(this.$data.pop());
      return this.get();
    }
  };

});
